/*
 * Copyright 2002-2007 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.springframework.rules.support;

import java.util.Comparator;

/**
 * Comparator for comparing Number instances.
 * <p>
 * Uses the double value of the number to do the actual comparison
 * 
 * @author Peter De Bruycker
 */
public class NumberComparator implements Comparator {

	public static final NumberComparator INSTANCE = new NumberComparator();
	
	private NumberComparator() {
		// singleton
	}
	
	public int compare(Object o1, Object o2) {
		Number n1 = (Number) o1;
		Number n2 = (Number) o2;

		return Double.compare(n1.doubleValue(), n2.doubleValue());
	}
}
